Quantum Mechanics | MCQs

Explanation

Albert Einstein is one of the most influential physicists of the 20th century.

In 1905 Einstein published four landmark papers in physics.

Einstein was awarded the Nobel Prize for his work on: Special theory of relativity

Albert Einstein received his Nobel Prize one year later, in 1922.

Explanation

Gamma rays are the highest energy photons, with energies typically above 100,000 electronvolts (eV).

They are a type of electromagnetic radiation, like X-rays and visible light, but with much shorter wavelengths and higher frequencies.

Explanation

The change in wavelength (Δλ) is given by the formula: Δλ = h/m0c (1 - cosθ), where θ is the scattering angle.

The maximum change in wavelength occurs when cosθ is -1, which happens when θ = 180°.

Explanation

The n + l rule helps determine the energy of orbitals, where n = principal quantum number and l = azimuthal quantum number.

For 3p orbital, n = 3 and l = 1, so n + l = 4, matching the given condition.

Explanation

Explanation

In electronic transitions, a direct transition from 2s to 1s is forbidden.

Due to quantum mechanical selection rules.

Explanation

Explanation

Explanation

In 1926, Schrödinger proposed the Quantum model of the atom using wave equations.

This model describes electrons as wave-like rather than fixed orbits.

Explanation

 While an electron always has an electric field due to its charge, its spin generates a magnetic field.

The motion of a charged particle (even if it's just spinning) creates a magnetic field.